第五章 角度调制与解调电路

5.2 5.1 5.3 5.4

5 16 41 22 53 54 25 26 27 2

1. 2. 3.

4.

551511AMPMFM 5-1-1

1.AM 5-1-2 2.PM (5-1-3) 5-1-4 (5-1-5)

PM 3.FM 5-1-6

5-1-7

FM FM PM p254 5-1-11. FM

5-1-9

5-1-10

5-1-11

, 5-1-12 12PM

5-1-14 (5-1-15) (5-1-16)

5-1-17 5-1-18 3. PM,FM 5-1-3

512FM,PM

5-1-23

n 5-1-4

.

5-1-4

5-1-21

FMnn 00

5-1-24

5-1-25

5-1-26 FM FM AM ,

513 . 5-1-27LF1. 1%

2.3. , 5-1-28 5-1-284.

5. (5-1-30) 1) FM

, ,F 2PM , ,

F .

200kHz

5141FMPM 2M3FMPM

52521 1 LC2

5-2-1

5-2-2

5-2-3

. 1. ,5-2-2

Hz/V 5-2-4

f

, 2.

. 5-2-5

522. 1.

1) 5-2-6 5-2-7

----

n

5-2-8

(5-2-9)

(5-2-10)

(5-2-11)

2 n x 5-2-4

5-2-4

n=2n=2 3

m x

1

2

3

4

5-2-13

5 5-2-14

m 4 5-2-5

5-2-5

2 1 5-2-6

5-2-17

5-2-16

nn2 2 x 5-2-7

3 5-2-18

5-2-19

5-2-20

1/P 1/PP

p267 5-2-8 1

2 p26 5-2-9 5-2-105-2-11 5-2-12523 5-2-13

5-2-9 140MHz

5-2-11

5-2-12

1. 2.

5-2-21

3 5-2-14

.

5-2-14

1

(5-12-24)

n

5-2-252

12) 5-2-18 3)

.

524 5-2-19

.

3%10% ,

1 5-2-21(a)

5-2-31

,

.

5-2-23

(b)

25-2-23m

,

,

5-2-34 5-2-35

n=2,m

3 5-2-22

5-2-22

.1 5-2-24 5-2-38

5-2-39 25-2-25 5-2-26 5-2-28

5-2-26

n=1, =2.51rad=1 ,

,

2

525

1. , n

2. 3. f

4 ,

, ,

531FMD 2PMD

531 1. f 2. 5-3-1

3. V/Hz

. 1. 2.1 5-3-2

2 f 5-3-3 3 5-3-4.

1

5-3-6

5-3-7 5-3-8

5-3-9

5-3-72 5-3-8

5-3-10 5-3-11 ,

5-3-12

5-3-921)

(5-3-15)

2) 3dB , , , 5-3-16

3)5-3-10

5-3-11 5-3-121 p291 5-3-13 2 5-3-14

5.3.2 5-3-15 1

5-3-15

2 5-3-16

5-3-16

5-3-17 5-3-18

5-3-17 1.

2.

( )

533

1. 5-3-19

,, , , p189 5-3-19

1) ,

, ,1 5-3-20

V

5-3-20, 2 , 5-3-21 ,

5-3-21

2 5-3-23

5-3-24

5-2-23

. 5-3-25

5-3-25

450 50 LCR

1. 5-3-26

3 1

5-3-28 5-3-29 5-3-30

5-3-28

5-3-25

1.

2 5-3-29(c) 5-3-31 5-3-32

3 5-3-30 5-3-33,

4 5-3-31

5-3-34

5-3-32

5 5-3-34 5-3-35

5-3-34

5-4 :Analog Modulation Digital Modulationkeying

5.4.1 1. 10

5-4-1abcd > 1ef

1.2. ,10 01Intersymbol Interference ISI

5.4.2 phase shift keying. PSK . 1. (5-4-1)

, 10k1 =1k0 =-10 / BPSK1 0

[ ] 5-4-2 P3055-4-2

2 , BPSK .BPSK,() 5-4-3,5-4-4

:,0 ,5-4-5 1001

5-4-5

()1 5-4-6BPSK,DPSK10 5-4-6BDPSK 5-4-7

5-4-7 BDPSK

3

1) 2) 5-4-8

543 1.1 2.13.

DFSK 5-4-12

A